# Copyright (c) 2008, Gian Merlino
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#    1. Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#    2. Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package Stasis::MobUtil;

use strict;
use warnings;
use Carp;
use Exporter "import";

our @EXPORT_OK = qw/splitguid joinguid/;

# returns (type, npc, spawncount)
sub splitguid($) {
    my ( $guid ) = @_;
    if( length $guid == 18 && $guid =~ /^0x/ ) {
        return ( hex( substr $guid, 2, 4 ), hex( substr $guid, 6, 6 ), hex( substr $guid, 12, 6 ) );
    } else {
        return ( 0, 0, 0 );
    }
}

sub joinguid(@) {
    my ($type, $npc, $spawn) = @_;
    if( @_ == 3 && defined $spawn ) {
        return sprintf "0x%04X%06X%06X", $type & 0xFFFF, $npc & 0xFFFFFF, $spawn & 0xFFFFFF;
    } else {
        return 0;
    }
}

1;
